What do you get when you mix one part action movie with one part holiday flick and add in a dash of sweaty tank top? Die Hard, John McTiernan’s genre-bending (Christmas?) action masterpiece for the ages, which sees a badass NYPD cop take on a skyscraper full of bad guys in the midst of an office holiday party. Here are things you might not know about the movie, which was released on July 15, 1988.